Entropy vs. Aggression
This calculator visualizes Entropy (mathematical randomness) as "Hacker Anger." The goal of a password isn't to be "unbreakable"—nothing is unbreakable given infinite time. The goal is to make the time required to break it longer than the age of the universe.
Brute Force Physics
A modern GPU rig can test billions of passwords per second. * "p@ssword" (8 chars): Cracked in < 1 second. * "CorrectHorseBatteryStaple": (4 random words): Cracked in Trillions of years.
The XKCD Method
Tricking humans is easy; tricking math is hard. Using 4 random words is easier to remember than "Tr0ub4dor&3" and technically much stronger because the search space (dictionary words) is massive compared to short strings.